Borehole problems and drilling accidents are liable to occur while drilling in western blocks in Tuha Oilfield, which is rich in salt lime beds.
吐哈油田西部各区块富含盐膏、膏质泥岩层，钻井时易发生复杂情况与事故。
The problems of low drilling efficiency and low core recovery due to borehole collapse were solved with pulling in casing while drilling through using combined BHA with casing.
采用组合钻具进行跟管钻进，通过随钻跟入的套管保护孔壁，解决因钻孔垮塌导致钻探效率和岩心采取率低等技术难题。
In the borehole electromagnetic wave techniques exist problems on "Imagereconstruction from incomplete projections data", the problems can be treated via "Squashing".
钻孔电磁波法有“不完全投影数据的重建图象”的问题，此问题可用压缩恢复法来弥补。
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